Alternating-current magneto for ignition and combustion engines.



G. A. BRIGGS. W I ALTERNATING CURRENT MAGNETO FOR IGNITION AND COMBUSTION ENGINES.

APPLICATION FILED JAN. 22, 1912.

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G. A. BRIGGS.

ALTBRNATING CURRENT MAGNETO FOB IGNITION AND COMBUSTION ENGINES.

APPLICATION FILED JAN. 22, 1912.

1,1 00,65 1 Patented June 16, 1914.

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WITNESSES G. A. BRIGGS.

ALTERNATING CURRENT MAGNETO FOR IGNITION AND COMBUSTION ENGINES.

APPLICATION IILEDYJAN. 22, 1912,

1,100,651, Patented June 16,1914.

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Z INVENTOR W Altorney GEQRGE A. BEIGG'E, OF ELKHARZI IV? ALTEfi-N ATHHQ UHE ENT MAGNEZIO For; ilGNI'ZFI Specificatimx of Letter 2 a Application filed January 1912. San-la Nov *5;

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- 1' (lining the lm'zz'wl in lllh T To all whom 51 m cam/1m Be it known ihat I, CTEURGE A. 1'5RIGGS, a cilizgn of the United Smtcs, u'eslding at E Hunt, in She mimnty of lllkhgn't, and mm 1 of lndiana, have inventbd Certain new and useful .lmprovemenu in Utemmtzin =Cm 1 rent Maglltw for lg jhm and (Inmhuslion Engines, of whivl'l the following is a wecifimtion. l

My Inventwn I'ulnfca in an in j 2mm E11 ul t eyig'lating Lm'rent nuw'mat .f

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and conlbusriun wgnws the (hml systmn, real in the n 1 mm I frangiornm' 60 h im: ai mail being mm;-

n with :1 double ihrnw switch ulna: wnmr (An b1: o w'i'utljfl s 1 man u J \urnaleri in {he {:fifik H 3 nmuf-ctwl at w o end, l 1 ram m :nnmww which head a drive shaft 4 is ccm nej-ciwl the rncl a, mu, m."

1 passes through an mu? plate 3. Ball 1 hreuky rm'a-r l 1: mp

6 and 7 an: flu-med in the and plate, '11 which hich hulk hi are rl-lehied for fm-ming l ln'enkc i haad plqtkfil l ihv lu l) 42 Ensulntxwl necttd t'o A c'i cnit 'asting ihe' cll cult ing pl) 7 524m l'l funns the} h lmi l' conn' :tefl (0 the other lcnniunl of thy m: The mmg 3 r 1-, 511183313 matu lc; Q, and vmuwtlwl in the head plate, of mm 1 zvh m' vi 'lwith is an urumtmv shaft 163. An cml 1: 0 ll thumb mm Himlazag an t .1'min':ils

provided Mil: ball luv-m l2 and UL be 3"] 4 an mvrfml :1: I m'; 40. The ihh llll u hich l'mlls ll an: rmgvlx'ell for Formtvlflninul i a w 5 filllff l hl l l I a l I J x I 111; a ournzll for he illllllllllll, shaft; 10. A ll hwi L V r l gear wh el 15 he mmmlwl on the armature i on tlullm v 'l-l ME 1 l X y Y shall w nch meshes wth :1 larger gear Wheel mil 5 31:! :Hyi'm" +4 mnm' rml than a ("up 1h ll' l ilph Um carbon being Collav 37 (in "wiuql .u

16 mm the dlStl'llHltGl shaft 17, The dis t ibuter shaft 17 is jmu'nahxl in a hub 18 formed in the end plate 11. ball races 19 and 20 being fm'metl in the hub, in whivh balls 21 are received for forming: journals for l the end plate l1 lull u Q1? ms the ll1fl 17, An lll uljlte il hub we concounseled Una-Pm which mwuring 32 10'" nected to the gear Wheel Uh 3nd nmunt ed on lh e insu'latd llljl') is a uletnl fan or dislyjbuler plate 23. A11 insulated block El is mo unfied o xl lhe epd plate 11 and is lmhl therenm ns'lpf studs 25 (Fig. i). All insu- 1 vided with a curved slot 53 through which a screw 54 passes, which screw is connected to the hub 42 of the end plate 11 for locking the circuit breaker in any of its adjusted positions, the screw permitting of the circuit breaker body being oscillated to suit the conditions for regulating the timin of the spark with the motor and the length of the slot gages the number of degrees to which the circuit breaker can be locked.

Mounted upon the armature shaft 10 is a two-faced cam 55. A circuit breaker hammer or lever 56 is pivotally mounted on the body of the circuit breaker 41 and is provided with a roller 57 which is normally held in engagement with the cam 55 by a spring 58. A contact s ring 59 is provided with a platinum point 60. The platinum point makes contact with a platinum point 61 on contact screw 62. The contact screw 62 is held in the contact post 46 by a lock nut 63. The compression spring 58 and contact spring 59 are connected to the body 41 of the circuit breaker by a binding post 64. Permanent steel horse-shoe magnets 65, 66, are mounted in the casing A and their lower ends form the fields at each side of the armature 2.

An oil cup 67 is formed in the end plate 5 and leading therefrom is a conduit 68 for conducting the oil to the journal bearings 6 and 7 of the drive shaft 4. A tube 69 conducts the oil from the oil cup 67 to ,the journal bearings of the distributer shaft 17 and a tube 70 conducts the oil from said cup to the journal bearings of the armature shaft 10.

The shuttle armature 2 carries a,coil of magnet wire 71, one end of which is electrically connected to the body of the core at 72 and the other terminal is connected at 73 to the rod 36 of the armature shaft 10. It will be seen that when the armature 2 is revolved within its fields, electrical current is set up or set in motion in the coil of wire 71, one spark of the plug going to the ground at 72 and the opposite spark of the plug going to the terminal 73, and then through the conductor rod 36 to the carbon brush 49, and thence conducted to terminal 39, shown in Fig.4. The rotation of the armature if transmits a rotary movement to the armatu e shaft 16, thereby transmitting a rotary movement to,;the gear wheel 16 through the gear 15. The rotation of the gear 16 causes the distributer plate 23 to be rotated, causing it to make contact with the contact points 32. It is to be remembered that the high tension current from the transformer flows to the terminal 0, and from the terminal the current is conducted through the wire 33 to the spring 34, thence to the wire 35, and thence to the brush 29 which a is in engagement with the distributer plate 23, so that when the plate 23 makes contact with one of the contact points of one of the terminals, the current will be carried out through the wire leading to the terminal at the upper end of the distributer and to the cylinder of the engine, as is timed in respective relation. The rotation of the armature shaft 10 causes the cam 55 to be revolved. The cam works against the roller 57 of the lever 64, causing the upper end of the hammer or lever to be oscillated for causing the hammer to actuate the contact spring 59 for breaking the primary circuit between the contacts 60 and 61.

The low tension alternating current system stepped up to a high tension is so common of to-day and so well understood that it is deemed unnecessary to show a wiring diagram, as it would be seen that the ground of the magneto will be only permanent on the low tension current. The terminal 39, which is electrically connected to the circuit end of the armature,will be the opposite end of the circuit. The contact post 46 being insulated from the metal parts of the circuit breaker body and electrically connected to the terminal 38, makes the third terminal for connecting with a transformer coil (not shown) which is commonly used in this type of magneto. The armature being of a shuttle type has two cycles with each revolution. The cam having two project-ions will operate the circuit breaker twice at each revolution of the armature. The relation of the gears between the armature shaft and the distributer shaft being two to one, will operat" the distributer shaft one half the speed the armature shaft, or, in other words, tee armature shaft makes two revolutions to one revolution of the distributer fan, and every time the armature has made one half a revolution or'one cycle, the distributer fan or plate has passedfrom one terminal to the next in rotation.

Having fully described my invention, what 1 claim as new and desire to secure by Letters Patent, is

1. In a magneto, the combination with an armature and an armature shaft, of a circuit breaker consisting of a stationary contact member and a movable contactmember, a cam mounted on the armature shaft adapted to be rotated upon the rotation of the armature shaft, a hammer pivotally mounted in the circuit breaker, means for holding the hammer in engagement with the cam, said cam adapted to actuate the hammer for causing the hammer to come in contact with themovable contact member for breaking the circuit. I

2. In a magneto, the combination with an armature and an armature shaft, of a circuit breaker jouinalcd around the axis of the armatureshai't, means for oscillating the circuit breaker around the axis of the armature shaft, an insulated bracket mounted in the circuit breaker, a stationary contact member udjustably mounted on the bracket, a movable contact member mounted in the circuit breaker and normally in engagement with the stationary contact member, a hammer, and a cam mounted on the armature shaft adapted to actuate the hammer for causing the hammer to come in contact with the movable contact member for breaking 10 the circuit.

In testimony whereof I affix-my signature, in the presence of two witnesses.

GEORGE A. BRIGGS.

Vitnesses:

PERRY L. TURNER, GRACE BAUM. 

